JXMultiSplitPane隐藏节点导致绘制问题

Question

当我隐藏JXMultiSplitPane的一个节点时，我遇到了绘制问题。下面的SSCCE说明了这种行为：

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

import org.jdesktop.swingx.JXMultiSplitPane;
import org.jdesktop.swingx.MultiSplitLayout;
import org.jdesktop.swingx.MultiSplitLayout.Divider;
import org.jdesktop.swingx.MultiSplitLayout.Leaf;
import org.jdesktop.swingx.MultiSplitLayout.Node;
import org.jdesktop.swingx.MultiSplitLayout.Split;

public class TestMultiSplitPane {

    public static final String LEFT = "left";
    public static final String CENTER = "center";
    public static final String RIGHT = "right";

    public static final String TOP = "top";
    public static final String MIDDLE = "middle";
    public static final String BOTTOM = "bottom";

    protected void initUI() {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Split horizontal = new Split();
        Split left = getVerticalSplit(LEFT, 0.5, 0.5);
        left.setWeight(0.2);
        Split center = getVerticalSplit(CENTER, 0.8, 0.2);
        center.setWeight(0.6);
        Split right = getVerticalSplit(RIGHT, 0.5, 0.5);
        right.setWeight(0.2);
        horizontal.setChildren(left, new Divider(), center, new Divider(), right);
        MultiSplitLayout layout = new MultiSplitLayout(horizontal);
        JXMultiSplitPane splitPane = new JXMultiSplitPane(layout);
        addButton(LEFT + TOP, splitPane);
        addButton(CENTER + TOP, splitPane);
        addButton(RIGHT + TOP, splitPane);
        addButton(LEFT + BOTTOM, splitPane);
        addButton(CENTER + BOTTOM, splitPane);
        addButton(RIGHT + BOTTOM, splitPane);
        frame.add(splitPane);
        frame.setBounds(50, 50, 1024, 768);
        frame.setVisible(true);
    }

    protected void addButton(final String buttonName, final JXMultiSplitPane splitPane) {
        final JButton button = new JButton(buttonName);
        splitPane.add(buttonName, button);
        button.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                MultiSplitLayout layout = splitPane.getMultiSplitLayout();
                Node node = layout.getNodeForName(buttonName);
                Split parent = node.getParent();
                parent.hide(node);
                splitPane.invalidate();
                splitPane.revalidate();
                splitPane.repaint();
            }
        });
    }

    public Split getVerticalSplit(String name, double topWeight, double bottomWeight) {
        Split split = new Split();
        split.setRowLayout(false);
        Leaf top = new Leaf(name + TOP);
        top.setWeight(topWeight);
        Leaf bottom = new Leaf(name + BOTTOM);
        bottom.setWeight(bottomWeight);
        split.setChildren(top, new Divider(), bottom);
        return split;
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new TestMultiSplitPane().initUI();

            }
        });
    }

}

你可以点击任何显示的按钮，它应该会被隐藏，但当我将鼠标移到不同的按钮上时，重新绘制分割窗格是有问题的。

对于那些使用Maven的用户，以下是必需的依赖项：

    <dependency>
        <groupId>org.swinglabs.swingx</groupId>
        <artifactId>swingx-core</artifactId>
        <version>1.6.3</version>
    </dependency>

Answer 1

我最终找到了解决方案。要在布局中隐藏节点，我们可以简单地使用displayNode(String, boolean)方法。

因此，在actionPerformed中，我需要调用的只是：

layout.displayNode(buttonName, false);

完全正常工作的代码：

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;

import org.jdesktop.swingx.JXMultiSplitPane;
import org.jdesktop.swingx.MultiSplitLayout;
import org.jdesktop.swingx.MultiSplitLayout.Divider;
import org.jdesktop.swingx.MultiSplitLayout.Leaf;
import org.jdesktop.swingx.MultiSplitLayout.Split;

public class TestMultiSplitPane {

    public static final String LEFT = "left";
    public static final String CENTER = "center";
    public static final String RIGHT = "right";

    public static final String TOP = "top";
    public static final String MIDDLE = "middle";
    public static final String BOTTOM = "bottom";

    protected void initUI() {
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        Split horizontal = new Split();
        Split left = getVerticalSplit(LEFT, 0.5, 0.5);
        left.setWeight(0.2);
        Split center = getVerticalSplit(CENTER, 0.8, 0.2);
        center.setWeight(0.6);
        Split right = getVerticalSplit(RIGHT, 0.5, 0.5);
        right.setWeight(0.2);
        horizontal.setChildren(left, new Divider(), center, new Divider(), right);
        MultiSplitLayout layout = new MultiSplitLayout(horizontal);
        JXMultiSplitPane splitPane = new JXMultiSplitPane(layout);
        addButton(LEFT + TOP, splitPane);
        addButton(CENTER + TOP, splitPane);
        addButton(RIGHT + TOP, splitPane);
        addButton(LEFT + BOTTOM, splitPane);
        addButton(CENTER + BOTTOM, splitPane);
        addButton(RIGHT + BOTTOM, splitPane);
        frame.add(splitPane);
        frame.setBounds(50, 50, 1024, 768);
        frame.setVisible(true);
    }

    protected void addButton(final String buttonName, final JXMultiSplitPane splitPane) {
        final JButton button = new JButton(buttonName);
        splitPane.add(buttonName, button);
        button.addActionListener(new ActionListener() {

            @Override
            public void actionPerformed(ActionEvent e) {
                MultiSplitLayout layout = splitPane.getMultiSplitLayout();
                layout.displayNode(buttonName, false);
            }
        });
    }

    public Split getVerticalSplit(String name, double topWeight, double bottomWeight) {
        Split split = new Split();
        split.setRowLayout(false);
        Leaf top = new Leaf(name + TOP);
        top.setWeight(topWeight);
        Leaf bottom = new Leaf(name + BOTTOM);
        bottom.setWeight(bottomWeight);
        split.setChildren(top, new Divider(), bottom);
        return split;
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {

            @Override
            public void run() {
                new TestMultiSplitPane().initUI();

            }
        });
    }
}

Answer 2

我知道你问这个问题已经有一段时间了，但是我找了很多，直到我找到了一个解决方案(虽然不是一个很好的解决方案)，也许这会对某人有所帮助。

我在添加到splitPane中的面板中添加/删除了很多组件，如果我在添加组件之前调整了拆分器的大小，它就会卡在那里，要么剪掉面板的一部分，要么变大。

正如文档中所说的：

只要重新定位任何分割器，

MultiSplitLayout的"floatingDividers“属性就会被MultiSplitPane设置为false。当floatingDividers为false时，每个叶(组件)的右/底边由它后面的分隔线的位置定义。换句话说，一旦用户移动了Divider，布局就不再依赖于任何组件的首选大小，而是由分隔线的当前位置和权重定义。

我所做的是在每次调整大小时调用setFloatingDividers(true)方法(与添加/删除组件相关的大小调整)。由此产生的问题是拆分器的位置丢失。